Pump.



E. W. CLARK.

PUMP.

APPLICATION FILED IAN.29, I9I4.

Patented Dec. 21, 1915.

. ImIR m IIMWV reciprocating parts f are surface of the for 'continuallyEDWIN w. CLA CHICAGO, immers.

. PUMP.

To all wvom' may concern y Be itl known that I, EDWIN W, CLARK, kacitizen of the United States, residing at Chicago,in the county of Cookand State lof Illinois, have invented a certain new and usefulImprovement in-Pumps, of which the following is a specification.

My invention relates to pumps, and the object of the invention'is toprocure a practical and sure `acting 'pump which may be lowered tothebottom of a well or cistern and operated by air or other gas underpressure conveyed to th'e'pump itself and dispensing with pump rodsorvother reciprocating parts operated mechanically from the ground andleading down through the'well to the pump cylinder. The ordinarydeepwell pumps operated 'by pump rods have certain inherentdisadvantages,

one disadvantage residing in the necessity overcoming the inertia y ofthe pump rod and connected parts which are necessarily heavy, especiallywhere the well is of considerable depth. Heretofore no commerciallysuccessful pumps-haine;v been produced, so far as Iam aware, in whichall of thereciprocating parts were confinedto and combined in a singlepump cylinder located atthe bottom of the welll and operated bycompressed air delivereddirectly to thev pump cylinder. Y

The object 'of my invention is to produce a fluid actuated pump insingle cylinder located at the bottom of the well, the parts being soconstructed andarranged'as to render the operation certain, the flowcontinuous and uniform and Vto avoid the possibility of delivering airinstead of water through the delivery pipe.

I accomplish my objects by the construcdraw' ings in which.- i

Figure 1 is ia central section of-thepump cylinder.` Fig. la is asectional viewof the central vportion ofthe' pump cylinder taken takenon an irregular plane of sectionv whichl on the irregular lineA la, la,Fig. 2. F ig.

Ilb is a central vertical section of the lower portion of the pumpcylinder, .Figsg 1 a nd` b' are shown in theiry properjuxtapositionexcept vthat the central portion, (Fig. la) is renders the view more o'rless','diagrammatic' and thus facilitates an understanding of theprinciple of operation.` Fig. 2 is a horizontal section' on the line2-2, Fig. *1* Fig. 3`

' proper,

which all of thelocated within a Patented. Dec. 21, 1915.

' Appncanon med' January 29, 1914. serial No. 815,121.

-is a horizontal section on the line 8-3, Fig. la.A Fig. 4 is ahorizontal sectionon ythe line Fig. l". Fig. 5 isa side elevation,partly in section, of the -main inlet and outlet valves.

Similar numerals refer to similar parts throughout the several views.

In the form selected-to illustrate the invention the cylinder consistsinV general of the center casting 1, the upper and lower sections 2 and3 respectively and the upper `and lower' end castings or caps 4t andrespectively. The center casting constitutes a valve chamber land haslianges la, la, projecting upward and downward from the chamber saidHanges being internally screw threaded to receive therthreaded endsofthe upper and lower cylinder sections. The upper and lower endcastings are much alike inl construction and by'preference simply fitover the upper and lower ends of the upper and lower cylinder 'sectionsbeing held in position by tie rods 6. Eachvof the end castings or capshas an inlet chamberA 7 and an outlet chamber 8. rlhere is an inlet portand valveseat 9 inl each ofthe upper and ylower end castings interposedbetween the inlet chamber 7 andthe inside of the cylinder. An'inletvalve 10 is located at'each of said ports 9 and is so arranged as topermit water to flow through the port toward the cylinder butpreventflow in the opposite direction.

While the exact form of valve is not an essential feature of theinvention, it is preferably constructed as shown separately in Fig. 5'in which it will be seen that the valve has a 'plurality of verticalribs 10a leaving The-nut is located far enough from the lugs l0b topermit the valve to open and close.

An outlet valve l1 1s mounted in each of the end castings 4 and 5 tocontrol the flow from the cylinder tothe outlet chambers'S. The outletvalves aremounted'in the valve seats 12 which form outlet ports and areconstructed exactly likev the vinlet preferably rlhey -arefplaced insuch a man'- valves 10. ner however,

as to'permit the flow from the" tot I IMS 43 land the result beingthat'when the air Xie:

cylinder but lprevent y flow. into `v-`the i cylinder. A delivery pipe13 screws into'the upper casting and leads from the upperoutletfchamberl tothe surface `of the ground or other point of delivery.- Abypass 14 connects the outlet chambers 3 in the upper and lower end'casting vare' placed at the admission :ports 4a and 5a. of the upperand lower end castings re* spectively.

Thev center whichin the'forin shown' consists of 'an outer `disk-24, aninner disk 'and cup leathers 26 interposed between them. l These disksscrew onto the; ends of the pistonrod, and

. theyinner disk in veach casehas `a hnb27 for. engaging the respectivestrike plates 301 to which I will now describe. f

The inlet chamberlinpthecenter cast.-

thereby operatel the air. controlling devices ing 1 communicates withthe-inside ofthef.

cylinder through the upper port and fvalve seat-32 and .lower port andvalve seat 33. The. outlet/,chamber 17 communicateswithV the insideofthe cylinderr through the up. per port and` valve seat 34 and lowerport., andl valve seat 35. A .valve 36 is located within-chamber 16andisfy so constructed as to vpermit-'air to flowv from the inlet;chamber alternately vto the upper and lower'v cyl-g inder-sections 2and1 3.- A verticallyribbed stem 37 j extends upwardv and downward fromvalve 361through the ports 32 and 33,

and at the end of each of the ribbed portions of thestem are stops 38against-which.

seat/helical compression springs 39. At the outer ends said stem passesthrough suitable, aperturesjin` the strike plates vand.. are.

there provided with nuts 40 whichfhold the strike plates seated, uponthe outer endof springs 3 9. Extending "through-.the lout-v letchambei17 a vertically ribbedvalve stem .42 provided'with valves 43 'and44 i located on the-outside of the ports 34 and 35 60 respectively.These valves 43 and 44 permit airto fiowalternately from the uppery iand lowercylinder sections '2, 3 intothe outletV chamberllf. Ity will benoted that the valve 36 is oppositely; arranged'to the valves @betweenthe `Valves 43,

VBy preference strainers casting lfhas aninle't'chamber f -16 'and anoutlet chamber 17 separatedbya partitionlS as 'best'sliown in Fig. v2.These chambers receive 'air only, and the -inlet'pj is*4 escaping'"dwiivadlyf from the inlet chamberf'l@ it willv escape downwardly tothe. 'loutlet'chamber 17 and yvice versa.- The heli- Y cal compressionspringsn 39 are interposed 'strike plates" 30 and the parts are heldassenibledv by fthe nuts inlet chamber.` .l

In operation, 'let ,-itfbe. assmuedffthatthe. parts areuin Atherelative` positions yshown in Figs. 11,';1a ,f13.. Under theseconditions the air, will pass .downward -from'finletfchamberi6 and exertface ofthelower pistoni A tthesame time upper piston and hence .thepistonrodf'and 44` and the respective f 40,' as previously de.;VVlscribed in connection' with. the valve 'in the pressure upon theupperfsur-f` I air-will escape from the space beneath ftheattachedpartsgwi11-aesna., Thiswiugforce the Water outfromthe spacelbeneath the lower 'piston .and ca .useitv to flowjipast the' loweroutletvalve11't`hrough.the by pass .14. and rip-*through the delivery .pipe13. Thev f pressure inthe space below the lowerpiston willv holdthelower. inletgvalve closed-and` Vp'revent y'the escape of water-pastit. The' ydescent of the upper piston 'will force-the air" attlie.`

out of the space -beneath it anc l.will, v same time permit thelpressure of vvaterfin'y the pipe; 13 tohold the upper 'outlet-,valve 11closedt'o preventthe waterffrom thegbyf pass ;lfrom vflowing throughsaid pipe 13.

saidgplate will be j'f o r `ced ,downward .and 'cause the reversalofthe-'position offthe lanywhere' .except flip' 1 I This action'wi-llcon-` v tinueuntilthejjboss 27-onfthe u'pperf-pistonmreaches.the-upperstrikeplate 3,0 whereupon 100 valves y36, 43 .and,4 4."The flowofboth air and water lwill nowbe'reversedand cause thefriserofthe pistonfrodfand connectedv parts, thus permitting thespace belowthe terlandffforcing the 'water fromth e}rspa ce piston out4 throughthei-delivery-j1p ipe 13.y y

From 'the foregoing .description' takenj f connection with thel drawings`itwillloe evi- `A dent that, as hasbeen proved from .the prac fticalfoperation of the device, 'mypump willr deliver a constant stream)of water. up .through thejj delivery. pipe but'thatjit is Apositiveinits actionandcan-by no I accident (so .long as Iffwhenihe pane; 'ishuftons and attached parts shouldistopin linter-v the parts are intact)-deliver. a'l'iythimegv butVV -rWater or whatever liquid itisthatsurrounjds vthe device.` 120' mediate position theweightof theairvalves *i said- 'valves toifdescclld tov their. r espective-A seatsand thus` 'cause thegpistons i to rise .as

valves neverdepart very far!l fromV their` seatsand hence unless vvvalve3:6 were,at. fth e` mathematical @enter Q- itsY travel the W soon-asthe;air is again-turned on..- VFurtlifer-f more, thepartsjare so designedthatzthegair f lesl the air valves air past it would tend to force it in`one direction or the other. In my device the piston rod passes throughthe center of the center casting. Thus the parts are all perfectlybalanced. In my pump, also, all of are inclosed within the maincylinder. This not only protects the operating parts but renders itpossible to group the entire mechanism in a small compass and hence itis possible to use my device in connection with driven wells where thewell casing is usually of comparatively small diameter. No priming isnecessary in starting up a pump of my construction and this avoids adisadvantage found in some pumps now on the market. As a result of myconstruction the moving parts are all small and hence there is no needto overcome the inertia of heavy parts such as the reciprocating pumprod in use in certain present day pumps. After my pump has stoppedrunning the weight of the entire column o water from the cylinder to thesurface of the ground or other point of delivery bears upon the watervalves and hence great pressure is exerted to keep said valves tightlyclosed. For this reason the deliveryv pipe tends to keep full for a longperiod after the pump has ceased to operate and consequently thedelivery of water at the discharge end of pipe 13 commences immeddiately as soon as the air pressure is turned on.

Having thus described my invention, what I claim as new and desire tosecure by Letters Patent, is: v

l. In a fluid actuated pump, a pump cylinder, an end cap at each end ofthe cylinder, each end cap having non-communicating inlet and outletchambers, an inlet valve for each vof said inlet chambers, an outletvalve independent of the said inlet valve for each of said outletchambers, said valves lying partially within and partially without thecylinder, two pistons, spaced apart and reciprocating in unison withinsaid cylinder, a center casting in said cylinder located between theends thereof and having an inlet and an outlet passage for the actuatingfluid, an inlet controlling valve for the ac- Gopies of thistuatingiluid movably mounted on said center casting for permitting theactuating fluid l to ilow alternately into the opposite ends of thecylinder, and an outlet controlling valve for the actuating iuid mountedon said center casting and movable independently of the inletcontrolling valve for permitting the actuating fluid toescape throughthe center casting alternately from opposite ends of the cylinder, thecontrolling valves being in position to be actuated by the said pistons.

2. In a fluid actuated pump, a pump cylinder, an end cap at each end ofthe cylinder, each end cap having non-communicating inlet and outletchambers, an inlet valve for each of said inlet chambers, an outletvalve independent of the said inlet valve for each of said outletchambers, said valves lying partially within and partially without thecylinder, two pistons, spaced apart and reciprocating in unison withinsaid cylinder, a center casting in said cylinder located between theends thereof and having an inlet and an outlet passage for the actuatingfluid, an inlet controlling valve for the actuating fluid seating uponsaid center casting, and movable to two different positions forpermitting the actuating fluid to flow alternately into the oppositeends of the cylinder, an outlet controlling valve for the actuatingfluid seating upon said center casting and movable independently of theinlet controlling valve to two different positions for permitting theactuating fluid to flow alternately from the opposite ends of thecylinder out through the center casting, the controlling valves being inposition to be actuated by said pistons and provided with cushioningmeans, a duct leading from the outlet valve at one end of the cylinder,and a by-pass leading to said duct from the outlet valve at the otherend of the cylinder.

In witness whereof, I have hereunto subscribed my name in the presenceof two witnesses.

EDWIN W. CLARK. Witnesses:

HARRY I-I. PORTER, LAURE'r'rA PORTER.

patent may be obtained for five cents each, by addressing theCommissioner of Patents,

Washington, D. C.

